Welcome back to the Community, @JamesVTT.

Thanks for sharing a screenshot of your concern. This gives me a better picture of why the Late fee feature is not showing in the company file.

If you’re using the UK version or other region, the Automatic Late fee option is only available in the US. We’re continuously working to enhance the product’s features. This is to ensure we can provide the best online experience.

I’ll send feedback about adding the automatic late fee (UK version) on your behalf for consideration in a future update. While this is not yet available, manually add the fee to your invoice.

Let me help and guide you on how to create a service item for the fee. Here’s how:

1. Go to the Sales menu and select the Products and Services tab to open the All lists page.
2. Hit the New menu to display the Product/Service information window and choose Service.
   
   
3. Type a term that will identify the item in the Name field.
   
4. Fill in the remaining fields and press the Save and close button.

After following these steps, you can start using the item to charge your customer. There are two ways on how to enter it on the invoice.

You can either add the fee as a line item to the existing invoice or create a new transaction. Check out the Add service fees manually to invoices article for detailed instructions.

Additionally, the following link contains a breakdown of articles on how to efficiently manage your customers' transactions and income:  Self-help guide.

Let me know in the comment section if you have any other concerns. I’ll jump right back in to answer them for you. Have a great rest of the day.